As I read Oak wilt (Ceraocystis fagacearum), a fungus, attacks most oaks
vascular systems. Once infected the trees die within a month after the
first symptoms appear. This is usually within the year of infection. It
usually kills individual trees or small groups of trees but, may infect
several hectares in size. The wilt is spread through root grafts and by
sap-feeding and bark beetles. I hope this helps.
Todd Berman